Weather History for Washington, DC

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Thursday, April 16, 2009

  Actual Average Record
Temperature  
Mean Temperature 52 °F 57 °F  
Max Temperature 64 °F 67 °F 92 °F (2002)
Min Temperature 41 °F 47 °F 29 °F (1943)
Degree Days  
Heating Degree Days 12 9  
Month to date heating degree days 175  
Since 1 July heating degree days 3851  
Cooling Degree Days 0 1  
Month to date cooling degree days 7  
Year to date cooling degree days 9  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 35 °F    
Average Humidity 58    
Maximum Humidity 86    
Minimum Humidity 28    
Precipitation  
Precipitation 0.00 in 0.10 in 2.09 in (1929)
Month to date precipitation 1.67  
Year to date precipitation 10.58  
Snow  
Snow 0.00 in 0.00 in T in (1988)
Month to date snowfall 0.0  
Since 1 July snowfall 15.4  
Snow Depth -    
Sea Level Pressure  
Sea Level Pressure 30.28 in    
Wind  
Wind Speed 8 mph (North)    
Max Wind Speed 13 mph    
Max Gust Speed -    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Apr. 16, 2009 Rise Set
Actual Time 6:30 AM EDT 7:46 PM EDT
Civil Twilight 6:02 AM EDT 8:14 PM EDT
Nautical Twilight 5:29 AM EDT 8:47 PM EDT
Astronomical Twilight 4:54 AM EDT 9:21 PM EDT
Moon 1:51 AM EDT (4/16) 11:16 AM EDT (4/16)
Length of Visible Light 14h 11m
Length of Day
13h 16m
Waning Gibbous, 59% of the Moon is Illuminated
Apr 16
Waning Gibbous
Apr 17
Last Quarter
Apr 24
New
May 1
First Quarter
May 9
Full

Hourly Weather History & Observations

Time (EDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:20 AM 42.8 °F 36.6 °F 37.4 °F 81% 30.21 in 10.0 mi North 11.5 mph - N/A   Overcast
12:52 AM 42.1 °F 38.4 °F 37.9 °F 85% 30.21 in 10.0 mi NNW 5.8 mph - N/A   Overcast
1:52 AM 43.0 °F 37.7 °F 39.0 °F 86% 30.21 in 10.0 mi NNW 9.2 mph - N/A   Overcast
2:52 AM 42.1 °F 36.1 °F 37.9 °F 85% 30.22 in 10.0 mi NNW 10.4 mph - N/A   Mostly Cloudy
3:52 AM 42.1 °F 37.1 °F 37.9 °F 85% 30.22 in 10.0 mi NNW 8.1 mph - N/A   Mostly Cloudy
4:52 AM 41.0 °F 34.7 °F 37.0 °F 86% 30.23 in 10.0 mi NNW 10.4 mph - N/A   Mostly Cloudy
5:52 AM 41.0 °F 35.8 °F 37.0 °F 86% 30.24 in 10.0 mi NNW 8.1 mph - N/A   Partly Cloudy
6:52 AM 41.0 °F 35.8 °F 37.0 °F 86% 30.26 in 10.0 mi North 8.1 mph - N/A   Scattered Clouds
7:52 AM 43.0 °F 37.2 °F 37.9 °F 82% 30.29 in 10.0 mi NNW 10.4 mph - N/A   Partly Cloudy
8:52 AM 48.9 °F - 39.0 °F 69% 30.30 in 10.0 mi North 6.9 mph - N/A   Partly Cloudy
9:52 AM 52.0 °F - 37.0 °F 57% 30.32 in 10.0 mi ENE 12.7 mph - N/A   Partly Cloudy
10:52 AM 54.0 °F - 33.1 °F 45% 30.33 in 10.0 mi NE 10.4 mph - N/A   Partly Cloudy
11:52 AM 57.0 °F - 33.1 °F 40% 30.33 in 10.0 mi ENE 6.9 mph - N/A   Clear
12:52 PM 59.0 °F - 32.0 °F 36% 30.33 in 10.0 mi ENE 8.1 mph - N/A   Clear
1:52 PM 60.1 °F - 27.0 °F 28% 30.32 in 10.0 mi Variable 3.5 mph - N/A   Clear
2:52 PM 61.0 °F - 28.9 °F 30% 30.30 in 10.0 mi Calm Calm - N/A   Partly Cloudy
3:52 PM 64.0 °F - 30.9 °F 29% 30.29 in 10.0 mi Calm Calm - N/A   Clear
4:52 PM 63.0 °F - 30.0 °F 29% 30.28 in 10.0 mi Calm Calm - N/A   Partly Cloudy
5:52 PM 64.0 °F - 30.0 °F 28% 30.28 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:52 PM 60.1 °F - 35.1 °F 39% 30.30 in 10.0 mi ESE 9.2 mph - N/A   Clear
7:52 PM 55.9 °F - 34.0 °F 44% 30.31 in 10.0 mi SE 5.8 mph - N/A   Clear
8:52 PM 54.0 °F - 37.9 °F 55% 30.32 in 10.0 mi South 5.8 mph - N/A   Clear
9:52 PM 51.1 °F - 39.9 °F 66% 30.32 in 10.0 mi SSW 5.8 mph - N/A   Clear
10:52 PM 51.1 °F - 32.0 °F 48% 30.32 in 10.0 mi SSW 4.6 mph - N/A   Clear
11:52 PM 50.0 °F - 35.1 °F 57% 30.32 in 10.0 mi SSW 4.6 mph - N/A   Clear